Changed startup delay logic

Author: pschatzmann

src/SnapConfig.h

@@ -41,7 +41,7 @@
 #  define CONFIG_CLIENT_TIMEOUT_SEC 5
 #endif
 #ifndef CONFIG_PROCESSING_TIME_MS 
-#  define CONFIG_PROCESSING_TIME_MS 172
+#  define CONFIG_PROCESSING_TIME_MS -172
 #endif
 #ifndef CONFIG_STREAMIN_DECODER_BUFFER
 #  define CONFIG_STREAMIN_DECODER_BUFFER (12 * 1024)

src/api/SnapTimeSync.h

@@ -58,7 +58,10 @@ class SnapTimeSync {
   /// Provides the effective delay to be used (Message buffer lag -
   /// decoding/playback time)
   int getStartDelay() {
-    int delay = std::max(0, message_buffer_delay_ms - processing_lag);
+    int delay = std::max(0, message_buffer_delay_ms + processing_lag);
+    if (message_buffer_delay_ms + processing_lag < 0){
+      LOGE("The processing lag can not be smaller then -%d", message_buffer_delay_ms);
+    }
     ESP_LOGD(TAG, "delay: %d", delay);
     return delay;
   }